US1464884A - Device or apparatus for avoiding the glare or dazzle emanating from lamps - Google Patents

Description

Aug; 14, 1923.

A. REEVES DEVICE OR APPARATUS FOR AVOIDING THE GLARE OR DAZZLE EMANATING FROM LAMPS Filed Dec. 8, 1921 Patented Aug. I4, 1923..

UNETE STTES arena caries.

ALFRED REEVES, 0F BIRMINGHAM, ENGLAND, ASSIGNOR OF ONE-HALF IO GEORGE HERBERT CUMING BUTLER, 0F BIRMINGHAM, ENGLAND.

DEVICE 0R APPARATUS FOR AVOIDING THE GLARE OR'IDAZZLE EMANATING FROM LAMPS.

Application filed December 8,1921. Serial no. 520,954.

To all whom it mm] concern.

Be it known that I, ALFRED Braves, a subject of the Kin dom of Great Britain, residing at 133 omerville Road, Small Heath, Birmingham, in the county of VVarwick, England, have invented certain new and useful Improvements in or Relating to Devices or Apparatus for Avoiding the Glare orv Dazzle Emanating from Lamps, such as the Electric Lamps of Automobiles, of which the following is a specification.

This invention comprises certain improvements in or relating to devices or apparatus for avoiding the glare or dazzle emanating from lamps, such-as the electric lamps of automobiles.

According to the resent invention, the breaking u of the llght in order to avoid dazzle is e acted in the region of the electric filament lamp bulb. To this end we provide .a screening or light-breaking up device which may envelop the filament lamp bulb, which may be located within the interior of the said bulb, or which may be located at the external or .internal surface of the glass of the said bulb.

In order that this invention may be clearly understood and readily carriedjinto practice, reference may be had to the appended explanatory sheet of drawings, upon which Fi re 1 is a perspective view illustrating; e present invention.

igure 2 is a rear elevation of the device shown in Fi re 1.

Figure 3 1s a sectional elevation of the device shown in Figures 1 and 2.

In one convenient embodiment of the present invention, the latter takes the form of a sheet metal shell which encloses or substantially encloses the bulb 1, and so breaks up the light emanating therefrom. This shell may be in the form of two substantially semi-spherical sections 2 and 3 which may be separated by a circumferential band of light (not shown) located in a plane transversely to the direction in which the lamp is ada ted to throw'its beam. The rear section of e said shell may have a perforation 4 through which the base plug 5 of the lam passes. This perforation 4 ma be form with notches 6 to accommodate t e trunnions 7 of the base plug 5, and the front section 3 of the shell may have a small perforation or may be suitably formed as indicated at 8 to receive the front point of the lamp bulb. The two'sections 2 and 3 of the shell may be coupled together in any appropriate manner, as for instance by springs 9.

Two springs 9 may be utilized and may be hooked at front and rear into perforations in the sections of the shell. It is, obvious that the means of breaking up the light may be varied very considerably. The.

element embracing the bulb may, for instance, be comprised of material other than sheet metal, and the perforations or lightemitting device may be provided by any a means.

In another embodiment of the present invention, the fore section 3 advantageously comprehends a series of fins or plates 10, arranged in parallel planes, which fins or plates may be of semi-circular form so that rays of light which otherwise would occur in a direction transversely to these plates are obstructed. The device may be fitted to the bulbin a manner whereby the said plates are located horizontally, vertically, or at any other desired angle. The said semi-circular plates may be secured to a semi-spherical frame consisting of a circular ring 11 adapted to be located transversely to the bulb, and a semi-circular ring 12 extending forwardly therefrom, theplates each being secured at three points to these supporting elements. The rear portion of the device may be of the construction according to the previously described embodiment, or said rear portion may also involve transverse plates or fins. In the embodiment shown, the rear half of the device is furnished with a series of radial erforations 16, and also with' a series of other openings formed by cutting tongues 17 and raising them appropriately from the periphery of the section.

The connection of the rear and fore portions of the device by springs 9 is incorporated in a manner whereby without any disconnection of the said springs the device may be readily slipped over the filament lam after which the latter may be assemble 1n the lamp holder as usual.

Provision is advantageously incorporated for preventing rotation of the anti-dazzle provision in relation to the lamp bulb. This provision advantageously comprehends means whereby the lamp bulb is resilient? gripped by the anti-dazzle device. Accor ing to one arrangement the fore part of the anti-dazzle device is provided at two diametrically opposite points with leaf springs 13 which are substantially parallel and which bear upon the periphery of the bulb. Each leaf spring 13 is at each end passed into a perforation or perfprations 14 in a fin portion of thedevice, and that part of the leaf spring which bears upon the bulb 1 may be enclosed within the short length of rubber tubing 15 to avoid abrasion and to increase the grip. I v

By virtue of this grip provision the antidazzle device may be located in any appropriate position of rotation upon the bulb, in which position it is effectively retained, as for instance with the fins of the fore-part of the device in horizontal planes. Adjustment may be effected either by displacement of the anti-dazzle device in relation to the bulb or by displacement of the holder for the bulb in relation to the lamp body by which it is carried.

What I claim as my invention and desire to secure by Letters Patent is 1. A device or apparatus for avoiding the glare or dazzle emanating from lamps, such as the electric lamps of automobiles, comprising rear and fore sections arranged to substantially enclose the electric bulb, the fore section being furnished with a series of light-emitting openings, and resilient means connecting said sections to enable the device to be slipped over the filament lamp.

2. A device or apparatus as claimed in claim 1, and in which the said means comprises springs encased with abrasion avoid- .ing material.

3. An anti-dazzle device comprising two sections divided transversely of the axis of the lamp bulb, and adapted to enclose the latter, one of the-sections being perforated to accommodate the base plug of the bulb, and the other section being provided with fins, springs connecting said sections together, and resilient means to secure said sections against rotation in relation to the lamp bulb.

In witness whereof I have hereunto set my hand.

ALFRED REEVES.

Images